- 註冊時間
- 2023-5-6
- 精華
- 在線時間
- 小時
- 米币
-
- 最後登錄
- 1970-1-1
累計簽到:5 天 連續簽到:1 天
|
發表於 2025-1-4 03:38:58
|
顯示全部樓層
is a significant concern for physicians. Central# Q9 _( N- T, l( G( k
precocious puberty (CPP), which is mediated9 U: g" |: K* @& C
through the hypothalamic pituitary gonadal axis, has
0 e9 x6 a" Q# a0 {7 \% v2 P1 Ca higher incidence of organic central nervous system3 S9 J6 w) y; I; h: y3 i4 d3 \
lesions in boys.1,2 Virilization in boys, as manifested
6 J( A2 g2 b0 _- S8 O m" n+ ~by enlargement of the penis, development of pubic- x; {7 }, F8 G- j9 F2 e( l. J
hair, and facial acne without enlargement of testi-
- g% W% W: n% M4 a( G. V" `cles, suggests peripheral or pseudopuberty.1-3 We) U- B$ l E; d
report a 16-month-old boy who presented with the+ h- |" V4 ?/ r$ ]# r
enlargement of the phallus and pubic hair develop-
' a( z2 ^6 I8 Wment without testicular enlargement, which was due* A$ u: y" ~8 ~$ ^: I; v% _( K. |! s% B
to the unintentional exposure to androgen gel used by
$ ~# ^4 h$ V5 {the father. The family initially concealed this infor-4 c$ ]6 o. t; A1 z: O$ l( Q
mation, resulting in an extensive work-up for this
' r: Y$ J. B& bchild. Given the widespread and easy availability of
7 p1 l! `: a3 M% F6 o6 {$ }testosterone gel and cream, we believe this is proba-' z2 q# `* y0 {, |
bly more common than the rare case report in the& [* y# i" P1 x4 t7 c: x
literature.4
: d* C8 W0 r- h+ m: UPatient Report J+ l! S( u8 D( ]; W. C# ^8 o7 I
A 16-month-old white child was referred to the
" `4 |. p" L( C. G o$ N ~endocrine clinic by his pediatrician with the concern
: i2 U' V, E0 ^7 \& Fof early sexual development. His mother noticed
6 v( I2 Z! Y! ?9 |+ [% [light colored pubic hair development when he was! u0 p$ c: b# T$ H
From the 1Division of Pediatric Endocrinology, 2University of5 n! C8 K R+ b( N7 X" a
South Alabama Medical Center, Mobile, Alabama.- O# J2 w- y% K
Address correspondence to: Samar K. Bhowmick, MD, FACE,; n! x" D! w4 V9 o3 V
Professor of Pediatrics, University of South Alabama, College of7 O/ e& y4 F F/ r% M, S& ?
Medicine, 2451 Fillingim St. Mastin 212, Mobile, AL 36617-2297;) _* c/ b2 X0 F4 T) a& Y- k0 d
e-mail: [email protected].
5 O. g, D( Q: E$ N0 _% F Kabout 6 to 7 months old, which progressively became1 V& y u# B: Q; n
darker. She was also concerned about the enlarge-
: @/ w+ A B* m! y* g; xment of his penis and frequent erections. The child
9 u8 j3 t* o* D- T) N* Jwas the product of a full-term normal delivery, with/ B( Y4 f( g4 o; S9 i! ]
a birth weight of 7 lb 14 oz, and birth length of* D$ V+ g% B; i+ j" D" z
20 inches. He was breast-fed throughout the first year$ z' ~4 Y" x4 e
of life and was still receiving breast milk along with
; k' X- ], K5 t& V! ?3 G" O; D+ Bsolid food. He had no hospitalizations or surgery,
6 t6 I d/ d3 ~0 Land his psychosocial and psychomotor development& @& @0 x0 j* C
was age appropriate.8 H9 C0 ~) p: b1 p3 Z* m# v o
The family history was remarkable for the father,
2 ` }( r1 I# |! Q& u) N7 k$ C1 _who was diagnosed with hypothyroidism at age 16,
; B) K3 S" L' T1 S" swhich was treated with thyroxine. The father’s) G4 }# a( ~8 A2 u0 l1 X
height was 6 feet, and he went through a somewhat! h ?9 g& j* Q+ C1 N; I' ^
early puberty and had stopped growing by age 14./ K: P4 x: A& ]
The father denied taking any other medication. The X1 g9 T! f4 J, r' v
child’s mother was in good health. Her menarche6 U& j5 b0 G4 u3 s& y8 k2 p* `
was at 11 years of age, and her height was at 5 feet
# z9 n8 r5 f1 l8 s6 ^5 inches. There was no other family history of pre-+ [5 e q& l7 v. v
cocious sexual development in the first-degree rela-) j# A5 g) _* F% I0 F9 U/ u
tives. There were no siblings.
/ k+ ]& h) E8 `( d) x- I% hPhysical Examination
$ {' A* g- @9 c( @' Q" I3 k& hThe physical examination revealed a very active,
% v. y f( [* S# W( d( Z/ {playful, and healthy boy. The vital signs documented- x& j4 k5 v2 f; Y& `/ e, Y
a blood pressure of 85/50 mm Hg, his length was
, B; a- D! V% w$ L. w/ u90 cm (>97th percentile), and his weight was 14.4 kg3 Q$ v7 J$ W# ^3 ^( m- @; S
(also >97th percentile). The observed yearly growth
& h7 B2 o; I' y! t! E* Tvelocity was 30 cm (12 inches). The examination of
* r( i5 I# ]$ U! G. F/ J& q6 j; Wthe neck revealed no thyroid enlargement.
* A( ^1 J! n- S1 M1 dThe genitourinary examination was remarkable for6 A, o4 b y* U
enlargement of the penis, with a stretched length of8 I& r' Z3 M3 X5 j5 W
8 cm and a width of 2 cm. The glans penis was very well
& D7 j% U! C0 y% }developed. The pubic hair was Tanner II, mostly around/ N# e- T. M1 K4 m
540
7 E3 T4 t. A5 q+ mat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from% Z8 a! A& s% j& P8 Z9 H. h
the base of the phallus and was dark and curled. The
5 k3 d' t4 A! `testicular volume was prepubertal at 2 mL each.
( F& K3 D7 a! L+ F5 ^) d2 C5 `The skin was moist and smooth and somewhat8 z% Q! Q/ p0 p. p
oily. No axillary hair was noted. There were no
4 s5 D; c7 e( ?# E8 l9 V: M" jabnormal skin pigmentations or café-au-lait spots.
% f. Y$ Z, u6 @2 d( d5 pNeurologic evaluation showed deep tendon reflex 2+
4 ?& `' r* x( e8 x% tbilateral and symmetrical. There was no suggestion
5 ] g) j8 T2 a# Lof papilledema.! h/ Y3 P) H7 F
Laboratory Evaluation( \) s, M: X+ @" ?! S3 g
The bone age was consistent with 28 months by; _( K+ c9 U; \$ H
using the standard of Greulich and Pyle at a chrono-
8 v0 A7 v7 b* a3 J" p* U: jlogic age of 16 months (advanced).5 Chromosomal
v0 J: t9 R7 C: c5 {karyotype was 46XY. The thyroid function test0 ?/ @. O" A2 ^2 t& u- r
showed a free T4 of 1.69 ng/dL, and thyroid stimu-3 x( C3 {6 h- H% x! C& o( ?& b1 C; k
lating hormone level was 1.3 µIU/mL (both normal)., y5 F1 s6 X2 Q/ a1 J+ |; ]; g
The concentrations of serum electrolytes, blood
% {; E( e( O1 u$ Y! Purea nitrogen, creatinine, and calcium all were# i1 L0 S$ h' Q. }2 z1 s1 p
within normal range for his age. The concentration
5 K3 a9 _& s q4 V6 Z, k g d6 Gof serum 17-hydroxyprogesterone was 16 ng/dL
4 T( P. H0 v6 ]. }(normal, 3 to 90 ng/dL), androstenedione was 20
' b1 m" V; N7 _6 T) Vng/dL (normal, 18 to 80 ng/dL), dehydroepiandros-, B+ ]( x# M h" j8 P# b, _) m% \
terone was 38 ng/dL (normal, 50 to 760 ng/dL),+ w! ~) D4 M0 b, M- L
desoxycorticosterone was 4.3 ng/dL (normal, 7 to4 d2 B( \" V y- P7 s1 {8 [
49ng/dL), 11-desoxycortisol (specific compound S)
+ }' n# l0 a6 ^was 43 ng/dL (normal, 10 to 156 ng/dL), serum cor-% U8 H( }2 z p+ t
tisol was 7.6 µg/dL (normal, 2.8 to 23 µg/dL), total: D1 Q1 A7 ] `% ]- e% o
testosterone was 60 ng/dL (normal <3 to 10 ng/dL),! _1 O- z) N) x6 U% t$ j0 Y
and β-human chorionic gonadotropin was less than
0 [! \) z* l& L8 j0 O$ C5 mIU/mL (normal <5 mIU/mL). Serum follicular6 }' ^8 X. U) K+ m( b
stimulating hormone and leuteinizing hormone
4 f! W7 O1 z. W0 Q1 g6 t/ P5 Nconcentrations were less than 0.05 mIU/mL& o P& p* N7 O9 d( M, F+ f
(prepubertal).9 N- ~& Q) d3 T8 A' g0 g+ |
The parents were notified about the laboratory* j7 y$ X8 \% |( o0 e5 ?; ^7 g
results and were informed that all of the tests were
H3 Q$ p4 m6 ?$ onormal except the testosterone level was high. The7 @$ b/ r3 I' J% d
follow-up visit was arranged within a few weeks to! n% Q: P8 I# A5 Y
obtain testicular and abdominal sonograms; how-
- Q: N' K% ]6 b! L: s# Hever, the family did not return for 4 months.( e4 `- [2 i9 a
Physical examination at this time revealed that the
; e: O7 g( z# q1 \! F: h! xchild had grown 2.5 cm in 4 months and had gained5 _. H+ P: l+ O9 p
2 kg of weight. Physical examination remained
- ?6 G) w- b& y- d' yunchanged. Surprisingly, the pubic hair almost com-- D3 q+ ]7 }" F' \$ C- ~9 {
pletely disappeared except for a few vellous hairs at! k4 X! Q& M/ N
the base of the phallus. Testicular volume was still 2
$ |+ A1 j. c8 r3 Y: `+ H+ rmL, and the size of the penis remained unchanged.4 ]$ L8 y$ D% f1 Z! V4 v F# D
The mother also said that the boy was no longer hav-
1 e2 Y' L+ ~" u; T& T- ning frequent erections.% I3 {! l. _# M8 I9 s
Both parents were again questioned about use of
4 N8 V" \) p5 X! G/ X K( s3 Pany ointment/creams that they may have applied to
; \8 c# D4 j0 i3 n5 C6 T, Fthe child’s skin. This time the father admitted the! z1 b: V+ |7 ?7 u3 l$ S7 G/ _7 ]0 w
Topical Testosterone Exposure / Bhowmick et al 541( Z% s3 y Y. S. O9 G
use of testosterone gel twice daily that he was apply-& A. I) j+ F7 U8 M0 [7 g0 S5 l; w. q; l
ing over his own shoulders, chest, and back area for8 { a0 Z5 H* N( J+ o" A7 H- z
a year. The father also revealed he was embarrassed
9 w! w+ o$ \- [to disclose that he was using a testosterone gel pre-
* @! x' J6 _% Uscribed by his family physician for decreased libido2 L9 [& ?" a- ]
secondary to depression.' P# [3 f( _9 @4 z4 p3 ?1 y
The child slept in the same bed with parents.
- }$ w" i- Q; E6 J" F7 I# X. M/ M1 yThe father would hug the baby and hold him on his
+ y/ B/ m7 G, U* bchest for a considerable period of time, causing sig- z/ B. M1 @4 R6 g! p* j2 G
nificant bare skin contact between baby and father.& q; Z, y# k5 w/ p
The father also admitted that after the phone call,/ E* F4 S* a" s! g7 W3 i* {
when he learned the testosterone level in the baby
/ |9 |1 x4 E. q' Mwas high, he then read the product information* |0 S4 C9 E0 |, c& M. ~' ^
packet and concluded that it was most likely the rea-( s1 x) D) P3 K. W6 p/ D9 w* P% k
son for the child’s virilization. At that time, they
, r S: [" ` {, j/ x4 J& |decided to put the baby in a separate bed, and the
2 o3 |, |5 y% X0 Rfather was not hugging him with bare skin and had- r& j7 W* C' Y+ f: N. o+ h
been using protective clothing. A repeat testosterone- X* H0 N1 Q2 ^ {
test was ordered, but the family did not go to the0 f6 c$ f+ z: U7 T$ Y' d+ G
laboratory to obtain the test.6 z$ }. H7 ]# q' j* U
Discussion
5 w( \8 {7 ?0 Z1 x2 [Precocious puberty in boys is defined as secondary
. F. S2 b: s& x- Osexual development before 9 years of age.1,4! V; e* M3 X( U* k j
Precocious puberty is termed as central (true) when
0 P- g( O' {, E' U- f' ]4 W0 ait is caused by the premature activation of hypo-$ r; t3 M2 H; _4 w" f9 B
thalamic pituitary gonadal axis. CPP is more com-- b9 o0 ?- q8 O* r/ X7 X
mon in girls than in boys.1,3 Most boys with CPP
4 Y# q u \; ~# o- Dmay have a central nervous system lesion that is
& L: G8 m& @. ~, d6 b$ U) c# Jresponsible for the early activation of the hypothal-
, M6 n5 M4 J9 a" y5 |2 [; |amic pituitary gonadal axis.1-3 Thus, greater empha-
5 y$ K! U5 G; Dsis has been given to neuroradiologic imaging in
8 h, {) w, Q' ^* jboys with precocious puberty. In addition to viril-
( d' G4 F! d, @, Gization, the clinical hallmark of CPP is the symmet-$ {- t8 N" U& D* `
rical testicular growth secondary to stimulation by
" ?* s$ A! X" Y- e6 z4 N% u+ Ogonadotropins.1,3
5 d, |* A; q8 q; t* B! dGonadotropin-independent peripheral preco-
. U1 Q2 t0 S( _: Dcious puberty in boys also results from inappropriate
, A7 q1 T$ f9 @; Y0 v, J( R7 i0 |androgenic stimulation from either endogenous or3 A- s: V7 y' g' y1 z
exogenous sources, nonpituitary gonadotropin stim-
, k5 c' R& { f8 }* Julation, and rare activating mutations.3 Virilizing
. W4 P9 B5 C4 p1 }" F/ A: e( u% Fcongenital adrenal hyperplasia producing excessive
$ w) \% g% f( {& yadrenal androgens is a common cause of precocious1 U, t) P0 x2 x
puberty in boys.3,4
7 t6 z6 }' I. W/ @6 M- R$ ]! XThe most common form of congenital adrenal
) {) k$ r6 w( H7 z, f! Chyperplasia is the 21-hydroxylase enzyme deficiency.
4 d! X* Z: f i0 @+ oThe 11-β hydroxylase deficiency may also result in7 x. Q( a" I4 l/ O
excessive adrenal androgen production, and rarely,+ Y" C5 R# b: O5 P
an adrenal tumor may also cause adrenal androgen
& i* s3 y9 p! S' I: K) S5 uexcess.1,3# u% }. g5 V2 T. n( R: q
at University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from( A4 n$ |0 E9 G+ [! ~5 S( J
542 Clinical Pediatrics / Vol. 46, No. 6, July 2007* ~; m7 u2 O: U5 [% X4 r8 d
A unique entity of male-limited gonadotropin-
( e4 r, s, _8 [' u. X/ L2 J) ?8 Windependent precocious puberty, which is also known
& I5 s9 I, p @; f3 q2 o1 ]- b$ E+ {as testotoxicosis, may cause precocious puberty at a
8 y& }' l- j) F9 y+ l- uvery young age. The physical findings in these boys1 g$ N2 p1 m8 H; z" A
with this disorder are full pubertal development,! Z, e) i1 `8 b5 G7 o1 a5 W
including bilateral testicular growth, similar to boys! p* r S+ ?- j
with CPP. The gonadotropin levels in this disorder' Z- j% O3 i6 Y& R
are suppressed to prepubertal levels and do not show! Z' r: t6 i6 @/ @" }4 s9 [, T
pubertal response of gonadotropin after gonadotropin-
8 k* L2 ^" L7 ^1 b/ [0 w) Mreleasing hormone stimulation. This is a sex-linked4 L0 [$ \/ }# u0 K: K7 {
autosomal dominant disorder that affects only2 T. t- K! K9 @' C7 L
males; therefore, other male members of the family
1 @+ X. m0 a% M! ?5 L0 Pmay have similar precocious puberty.3# _+ m; Z1 l& G8 f
In our patient, physical examination was incon-, `6 u& W6 j; L3 o) n
sistent with true precocious puberty since his testi-
2 k% Y$ j$ z9 U" N) H' {cles were prepubertal in size. However, testotoxicosis9 e7 A# ~6 A3 ?. l2 S7 S. o
was in the differential diagnosis because his father: f; v" K. m: n/ `* o( w. u
started puberty somewhat early, and occasionally,
" \5 c ?. e6 [1 _% B: O. x! utesticular enlargement is not that evident in the2 z& X5 ?6 N0 f2 q) d6 [* r0 B
beginning of this process.1 In the absence of a neg-
$ Q) D9 ~5 U! uative initial history of androgen exposure, our
7 y* d0 C. k( Ybiggest concern was virilizing adrenal hyperplasia,2 k1 n- s. @3 M
either 21-hydroxylase deficiency or 11-β hydroxylase# l: _5 b- s4 Y, Z; T& Q' R, _! A, L
deficiency. Those diagnoses were excluded by find-# j6 c) q) z/ ~
ing the normal level of adrenal steroids.- M E' M2 o, A; T3 d7 ]
The diagnosis of exogenous androgens was strongly1 G# V7 C- c+ R7 d) L
suspected in a follow-up visit after 4 months because
* X+ [! k% `- A5 J' E( Mthe physical examination revealed the complete disap-
+ d% T! b) m1 npearance of pubic hair, normal growth velocity, and
+ |& g8 [! R. t! N v& M/ s. X8 C' S! L Gdecreased erections. The father admitted using a testos-6 z+ S# ~; r6 J- ~' l( u; l+ H
terone gel, which he concealed at first visit. He was6 }' s5 Y8 t' L, H/ h
using it rather frequently, twice a day. The Physicians’# x" ]1 i2 n) T, Q [8 x
Desk Reference, or package insert of this product, gel or
# j! z& c0 `8 n" K0 _cream, cautions about dermal testosterone transfer to# h* A$ [1 s0 h; Z" m$ d
unprotected females through direct skin exposure.
/ \ M4 Z4 |% M( iSerum testosterone level was found to be 2 times the' V$ S" z5 W8 T( Q3 t
baseline value in those females who were exposed to" f! K: a! z3 e, ^, b( C( U# y7 ]3 `' B3 _
even 15 minutes of direct skin contact with their male
# F& \1 W O$ P7 wpartners.6 However, when a shirt covered the applica-3 b) {4 Q1 ]3 P- N! u( F
tion site, this testosterone transfer was prevented.
! F' l6 l7 s0 I Z9 cOur patient’s testosterone level was 60 ng/mL,
" Y5 v! N- l( l, C" o# x' hwhich was clearly high. Some studies suggest that
: {5 K7 K8 d& k6 y$ D% Y) V$ edermal conversion of testosterone to dihydrotestos-
0 a4 L; [. U0 y" O- S% Hterone, which is a more potent metabolite, is more4 B( a, R1 E$ ?/ Q3 g" ], D# {
active in young children exposed to testosterone
' t5 `5 e0 k# I, t: t! Aexogenously7; however, we did not measure a dihy-
1 E; X2 O7 e6 w! b$ T* ^2 C( edrotestosterone level in our patient. In addition to/ {$ I' @, o q2 x& v* E: ]
virilization, exposure to exogenous testosterone in" j% c! U* P$ Y; L' C: n
children results in an increase in growth velocity and
2 T: r8 Z. ~) y. y3 G4 padvanced bone age, as seen in our patient.: Z" L3 w' G* K* e
The long-term effect of androgen exposure during: Z; E! V4 ^; L4 Q1 u5 a
early childhood on pubertal development and final
% Y8 E' f5 J9 s) ^# Dadult height are not fully known and always remain
9 ?6 ? E" Q' G( z D; C( |a concern. Children treated with short-term testos-2 E4 ?" }' t$ k2 h$ c& O g! d
terone injection or topical androgen may exhibit some
0 x9 j& z: _, z' g, v. D4 D) pacceleration of the skeletal maturation; however, after# E, {5 {) K+ ^- o
cessation of treatment, the rate of bone maturation
) _9 p4 I6 B1 y* Rdecelerates and gradually returns to normal.8,9 k: R/ k# |& l+ n
There are conflicting reports and controversy
. F6 Q: ]" N c7 h# E* q/ z0 qover the effect of early androgen exposure on adult
: ^8 h% J, d5 G. bpenile length.10,11 Some reports suggest subnormal" L2 v6 B" o' N4 O, e/ w3 S* L
adult penile length, apparently because of downreg-/ [8 _) E2 w% L6 B1 t$ z9 l5 V) O
ulation of androgen receptor number.10,12 However,/ ^# K( o! o; p: _4 @
Sutherland et al13 did not find a correlation between* b0 v6 }, G* Z: V5 X0 X; a, C
childhood testosterone exposure and reduced adult) z7 J4 }7 B" K) w' {: B9 N
penile length in clinical studies.0 x; \' F: G! ~( l. \! I
Nonetheless, we do not believe our patient is
S2 i" |: `1 H3 u2 F2 O: ^* Ggoing to experience any of the untoward effects from# _( S& C. |$ D% k9 j ]
testosterone exposure as mentioned earlier because3 ]& H& g, f: j& f: z% f5 H
the exposure was not for a prolonged period of time.
5 J( s3 E6 p/ T: v9 WAlthough the bone age was advanced at the time of
9 R5 @3 P7 h* J0 h, ]: @diagnosis, the child had a normal growth velocity at3 h3 H- p6 D5 O& Z
the follow-up visit. It is hoped that his final adult) G; b4 R4 j) Z' A% U- z- _
height will not be affected.5 \( }/ @5 M0 A( D
Although rarely reported, the widespread avail-
0 b l/ h' G5 e: k. p" ~; y! gability of androgen products in our society may. r" k6 S7 T9 d& q0 i
indeed cause more virilization in male or female. b0 P9 U5 O3 _" z6 B9 F
children than one would realize. Exposure to andro-6 ^8 C! ^2 Y, j$ e" {
gen products must be considered and specific ques-
8 z1 B* h/ L# o! O% O ttioning about the use of a testosterone product or
1 B5 A! _: J4 h; H8 Ggel should be asked of the family members during
6 p: ]9 g5 l; U) v8 Othe evaluation of any children who present with vir-! t5 i& v; U! {+ w% s
ilization or peripheral precocious puberty. The diag-
5 b' s! }# _- s! ]% { Q* B8 gnosis can be established by just a few tests and by! P/ p' H. a* l& I4 p
appropriate history. The inability to obtain such a9 w' ~ c' ^' _& u }
history, or failure to ask the specific questions, may
3 X. O- E! [% P/ H8 O6 Eresult in extensive, unnecessary, and expensive
8 O! @9 O/ u6 ~4 n# V3 ninvestigation. The primary care physician should be
7 U) z) `6 A4 ?aware of this fact, because most of these children
: d, H3 D) |1 m2 F3 Wmay initially present in their practice. The Physicians’
, ?8 e `! O c' E* z0 v0 W! cDesk Reference and package insert should also put a* R$ O$ T, o" t0 h( R
warning about the virilizing effect on a male or
8 W5 Z! R+ L2 A# p* }- gfemale child who might come in contact with some-2 V1 ~0 d; N" X4 ?$ I! N8 l, N
one using any of these products.) Z/ V+ K# O0 x6 J/ ?8 m) P" {
References: z- K0 a' M, c/ [
1. Styne DM. The testes: disorder of sexual differentiation y8 [& y* t {8 x
and puberty in the male. In: Sperling MA, ed. Pediatric# e* x8 m. v# V( {
Endocrinology. 2nd ed. Philadelphia, PA: WB Saunders;$ e( z O) l; U! d
2002: 565-628.3 Q- Z9 A L# H) q
2. Rivarola M, Belgorosky A, Mendilaharzu H, et al. Precocious# e u, S6 A; h- f. r+ C( P( I+ H }
puberty in children with tumours of the suprasellar pineal
" b+ g; A7 N. r0 a \; O; jat University of Manchester Library on May 25, 2015 cpj.sagepub.com Downloaded from1 D4 M9 V, E( W% H7 U5 S
Topical Testosterone Exposure / Bhowmick et al 543- N+ G ]5 l5 o) f9 d4 G' F
areas: organic central precocious puberty. Acta Paediatr.
/ S" }% a- Z9 |2 A e% n8 ^2001;90:751-756.( o# H4 z# w6 g0 o* \. Z% {
3. Lee PA. Puberty and its disorders. In: Lifshitz F, ed.5 e7 N# w& V2 K; S O
Pediatric Endocrinology. 4th ed. New York, NY: Marcel
& M! O" T" }% `Dekker Inc; 2003:211-238.( m1 G! a+ p7 [" i @2 z( ^+ y
4. Yu YM, Punyasavatsu N, Elder D, D’Ercole AJ. Sexual
& U! z$ ~: R1 V* {development in a two-year-old boy induced by topical, S$ z F1 P' }6 z7 t2 m6 k
exposure to testosterone. Pediatrics. 1999;104:e23./ F( {, c7 P& l3 F) v1 Q5 o) |
5. Greulich WW, Pyle SI, eds. Radiographic Atlas of
. X5 O2 n' b7 V' D8 L3 |. LSkeletal Development of the Hand and Wrist. 2nd ed.3 k* T$ b( V" Q0 x- c. Q
Stanford, CA: Stanford University Press; 1959.; W: S& i8 G5 X
6. Physicians’ Desk Reference. Androgel 1% testosterone,
# O% M- i6 ?+ I& l# |* bUnimed Pharmaceutical Inc. Montvale, NJ: Medical
) \0 N+ T" t% y' S t' oEconomics Company, Inc; 2004:3239-3241.) s) F* _, }2 U# X' M! F
7. Klugo RC, Cerny JC. Response of micropenis to topical( H. H# C0 ?) {
testosterone and gonadotropin. J Urol. 1978;119:
; n- m) i9 u ?) x667-668.
4 }1 s% y3 n: r/ l: t8. Guthrie RD, Smith DW, Graham CB. Testosterone
* w0 V* l; O0 xtreatment for micropenis during early childhood. J Pediatr.( e0 J' x+ {9 u2 w
1973;83:247-252.
7 c- m' W+ e5 S9 u2 \4 w9. Jacobs SC, Kaplan GW, Gittes RF. Topical testosterone
B: w# I! e; A7 O0 J6 n3 ]' g/ Ptherapy for penile growth. Urol. 1975;6:708-710.7 {0 j1 p, [* O I' S
10. Husmann DA, Cain MP. Microphallus: eventual phallic
9 n; V/ E# L4 E3 Bsize is dependent on the timing of androgen administra-
1 B; Q+ ?6 Y+ T3 i ntion. J Urol. 1994;152:734-739.
$ V" t0 D* m- s- ]' g' G; D11. McMahon DR, Kramer SA, Husmann DA. Micropenis:
# c; W1 F5 d% tdoes early treatment with testosterone do more harm) r( V) {& }3 I1 D: _6 m
than good? J Urol. 1995;154:825-829.$ K5 P$ D* ?) \' u
12. Takane KK, George FW, Wilson JD. Androgen receptor+ ?8 W/ h" Z) H8 p
of rat penis is down-regulated by androgen. Am J Physiol.
4 d( b1 w+ {% y+ K1990;258:E46-E50.' b8 F7 j' u5 Z8 ^
13. Sutherland RS, Kogan BA, Baskin LS, et al. The effect+ D# L# X0 R! z
of prepubertal androgen exposure on adult penile
/ }* G5 S/ s( E/ B$ n0 V' Rlength. J Urol. 1996;156:783-787. |
|